Dynamically induced frustration as a route to a quantum spin ice state in Tb2Ti2O7 via virtual crystal field excitations and quantum many-body effects

被引：227

作者：

Molavian, Hamid R. ^{[1
]}

Gingras, Michel J. P.

Canals, Benjamin

机构：

[1] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada

[2] Univ Canterbury, Dept Phys & Astron, Christchurch, New Zealand

[3] CNRS, Inst Neel, F-38042 Grenoble 9, France

[4] Univ Grenoble 1, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.98.157204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Tb2Ti2O7 pyrochlore magnetic material is attracting much attention for its spin liquid state, failing to develop long-range order down to 50 mK despite a Curie-Weiss temperature theta(CW) similar to -14 K. In this Letter we reinvestigate the theoretical description of this material by considering a quantum model of independent tetrahedra to describe its low-temperature properties. The naturally tuned proximity of this system near a Neel to spin ice phase boundary allows for a resurgence of quantum fluctuation effects that lead to an important renormalization of its effective low-energy spin Hamiltonian. As a result, Tb2Ti2O7 is argued to be a quantum spin ice. We put forward an experimental test of this proposal using neutron scattering on a single crystal.

引用

页数：4

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